Microcoding the time processor unit of the M68300 and M68HC16 MCU'S

The Time Processor Unit is a modular component of the MC68300 and MC68HC16 families of microcontrollers. Both of these families of MCU's are based on modules that can be connected to a common bus. This bus, known as the Intermodule Bus or IMB, serves as the data/address/control bus structure to connect the modules together. The CPU module can communicate with the other modules by reading/writing the control and data registers of a particular module. Some modules have there own local processor or arithmetic logic unit complete with local RAM and ROM. In this case the CPU can communicate with modules of this type through dual-ported RAM. The Time Processor Unit is a module of this type.